The worldwide Boycott, Divestment, and Sanctions (BDS) movement faces push back from a Republican lawmaker in California, who proposes a state ban on contracting with companies which support the successful campaign against the right-wing Israeli government.

BDS, which mirrors the anti-apartheid movement of South Africa, has become the target of the Israeli government and its global allies after costing the country’s economy up to $4.6 billion every year, according to estimates by the Rand Corporation.

“California and Israel have historically stood together as allies due to our unique bond founded on shared values, a bilateral trade relationship, and our unwavering commitment to freedom and democracy,” he said. “It is unconscionable for our state to do business with companies that play politics and boycott our critical allies.”

Israeli politicians have also voiced support for the California bill, including the Knesset’s deputy speaker Yehiel Bar, who said more states should oppose the BDS campaign.

BDS supporters have continued to push for Palestinian rights across the US despite calls from Israel to stop the boycott.